US617015A - Nut-lock - Google Patents

Description

No. 6l7,0l5. Patented Ian. 3, I899 T. HARDING.

NUT LOOK.

(Application filed July 6, 1898.! (No Model.)

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FFIGEt THOMAS HARDING, OF SAN JOSE, CALIFORNIA.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 617,015, dated January 3, 1899.

Application filed July e, 1893.

To all whom zit may concern:

Be it known that I, THOMAS HARDING, a citizen of the United States of America, residing at San Jos, in the county of Santa Clara and State of California, have invented certain new and useful Improvements in Nut- Locks; and I do herebydeclare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invent-ion is an improvement in nutlocks, the object of the same being to provide a device of this character which shall be simple and cheap in construction and durable and effective in use, forming a strong and firm lock that is readily and conveniently applied to an ordinary bolt and nut without requiring any alteration thereof.

Having the above objects in View, the invention contemplates the production of a lockwasher comprising an annular plate cut or slit to form two projecting spring-tongues, the ends of which are beveled at an angle to engage the corners of the nut and bear flatly against the opposite sides of said nut, said washer also having lugs or spurs at the inner ends of the concentric slits, said lugs being swaged or struck from the washer and projecting from the under side thereof to engage the object through which the bolt is passed, forming a strong and durable connection that will prevent the washer from turning in either direction.

The following specification enters into a detail description of the invention, reference bein g had to the accompanying drawings, and to letters thereon, which designate the different parts, and what is claimed as new in the art is more particularly set forth in the appended claim.

In the drawings, Figure l is an elevation showing the application of the invention to a railroad-joint. Fig. 2 is an inverted plan view, enlarged, of the improved lock-washer which constitutes the invention. Fig. 3 is an edge View of said washer. Fig. t is a sectional view on the line 4 4 of Fig. 2.

Referring more particularly to said drawings, wherein like letters of reference refer to like parts throughout the several views, A designates the threaded bolt, and B the nut Serial No. 685,272. (No model.)

which is turned thereon, these parts being of the ordinary construction and illustrated herein to show the application of the invention.

0 designates the improved look-washer, which in use is slipped upon the bolt A in ad Vance of screwing the nut B thereon, and in carrying out my invention or improvement upon washers of similar design the said washer or annular plate C is provided at opposite sides with a slit (Z, located adjoining the periphery of the washer and joined at one end by a tangential slit d, forming tongues D D, which are bent or sprung upward so that the free ends thereof will lie normally above the upper surface of said washer. These tongues extend in the same direction around the washer, and the terminals or free ends project only sufficiently to form a shoulder or stop, which contacts with the opposite corners of the nut and prevents backward rotation thereof.

From the under side of the washer or annular plate 0 project lugs or spurs E, which are stamped or swaged from the plate and are conical in shape, the said conical lugs or spurs being located at the inner end of the concentric slit d to reinforce the same.

In use the lock-washer is placed upon the bolt with the tongues D projecting outward and the lugs or spurs E inward, after which the nut is placed upon the bolt and screwed down upon said washer,and in case the washer bears against a wooden object or beam the spurs will be forced thereinto during the operation of turning the nut, the corners of the latter riding over the tongues D to be engaged thereby and prevented from backward rotation.

In the event of the device being used in con nection with a metal part or fish-plate, as shown in the drawings, the said metal part is provided with an indentation to receive the spurs or lugs, the said indentation being made by a prick-punch.

. I am aware that it has been proposed to form a lock-washer having projecting tongues and opposite spurs, the latter being bent from the washer, also to provide a lock-washer with projecting spurs swayed therefrom; but with the particular construction of my improved lock-washer a better engagement is had both with the nut and object connected by the bolt and nut, for by locating the lugs or spurs at the inner ends of the slits the latter are reinforced, while both ends of the tongues are so beveled that they are parallel with each other and bear flatly against the opposite sides of the nut and consequently oppose a lateral strain or tension. It will be noted, therefore, that I provide a lock washer which is very strong and durable and also possesses the important advantage of being cheap in construction, as they can be manufactured at a minimum cost or but a little more than the ordinary plain washer.

Having thus particularly described my invention and set forth the advantages attained by the particular construction of detail parts, what I claim to be new, and desire to protect by Letters Patent, is

In a nu t-lock, the combination with the nut 13, of a lock-washer 0 having concentric slits d at opposite sides adjoining the periphery and tangential slits cl extending from the periphery and connecting with one end of the aforesaid slits, forming spring-tongues D with ends which are beveled as shown and so disposed as to bear flatly against opposite sides of the nut; and spurs swaged from the washer at the inner ends of the concentric slits to project from the inner side of said washer, as herein shown and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS HARDING.

WVitnesses:

D. D. TENNYSON, J. A. FAIROHILD.

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